Hydrocarbon-engine.



I. IVI. ALLEN.

HYnRocARoN ENGINE.

APPLICATION FILED DEC.5. ISIS. IIENEWED MAR. IB I9I5.

Patented Apr. 27, 1915.

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rHE MORRIS PETERS co.. PHT'O'L/Tlo.. WASHINGVDN. D v

'1. M. ALLEN.

HYDROCARBON ENGINE.

APPLICATION FILED oEc.5. :913. RENEWED MAR. 18.1915.

l 37,445. Patented Apr. 27, 1915.

2 SHEETS-SHEET 2.

@fw/MWL THE NoRRls PETERS CO., PHOTU-LITHO.. wAsHlNGroN. D. CA

U NITED STATES PATENT 'i OFFICE.

JAMES M. ALLEN, O`.Er ST. LOUIS, MISSOURI, ASSIGNOR OF ONE-TENTH TO'WALTER A. GRUENEWALD, GF ST. LOUIS, MISSOURI.

HYDROCARBON-ENGINE.

Specication of Letters Patent.

Patented Apr. 27, 1915.

Application filed December 5, 1913, Serial No. 804,886. Renewed March 18, 1915. Serial No. 15,390.

To all whom t may concern:

Be it known that I, JAMES M. ALLEN, a citizen of the United States, and resident of St. Louis, Missouri, have invented certain new and useful Improvements in .Hydrocarbon-Engines, of which thez following is a specification containing a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to improvements 1n hydrocarbon engines, and consists in the novel construction hereinafter described and specifically designated in the appended claims.

The object of my invention is to provide an improved twin cylinder hydrocarbon engine which shall have a single compression chamber of ample size connected to a plurality of cylinders.

A further object of my invention is to provide an improved hydrocarbon engine with twin cylinders each having a piston therein, and a single connecting rod arranged to convey power of both pistons to a single crank. n

In the drawings Figure 1 is a vertical section taken through my improved hydrocarbon engine on the line 1-1 of Fig. Fig. 2 is a sectional plan view of the engine with parts broken away; Fig. 3 is a .detail sectional view of a portion of the cylinder-head showing the arrangement of one of the valve-seats; Fig. 4 is a front elevation of the engine; and Fig. 5 is a sectional plan view taken through the lower portion of the cylinders on the line 5-5 of Fig. 4.

My invention may be applied to either the four cycle or two cycle form of engine, the former being shown in the present drawings.

The numeral 1 indicates the usual crankcase having mounted therein a crank-shaft 2 carrying the usual fly-wheel 3.

Mounted upon the upper portion of the crank-case 1 is a plurality of twin cylinders 4, which extend parallel andeach cylinder is separated from its twin by a partitionwall 5 which extends from the compressionspace 6 toward the crank a considerable distance, but not suficiently far to prevent a single cross-head 7 from straddling said partition-wall and directly connecting the twin pistons 8. The cross-head 7 is bifurcated at its upper end, and the forks thereof are extended upwardly within said twinpistons and secured therein by the bolts or rivets 9, which pass through the over-lapping parts. l A single connecting-rod 10 connects said cross-head pin 11 to a single crank 12 of said crank-shaft 2. A singleA compression-chamber 6 connects the interior of the said cylinders 4, at the upper ends of the latter.

It will be observed that the forks of the bifurcated cross-head 7 straddle the lower end of the said partition wall 5 when the pistons are at the end of their upward stroke, said partition wall being limited in its length for this purpose.

There may be as many twin cylinders as the work requires, I having shown in the present instance two twins mounted on a single crank-case, but it is obvious that the number of twins may be increased or diminished according to the work required of the engine. The said pistons 8 are provided with the usual packing-rings 13, and the upper portions of the twin cylinders are provided with the usual water-j acket 14.

The numeral 15 indicates a common cylinder-head which is provided with the usual water-jacket 16 and extends across the compression-space 6 of both cylinders composing a twin, so that there is but a single cylinder-head for the twin cylinders.

The valves and valve-gear of my improved engine may be of any ordinary construction, although in the present case I have shown the valve-casings 17 formed integral with the cylinder-head 15, and suitable cams 18 for operating the valve-stems 19, said cams being driven by the usual sprocket-wheels 20 connected by a sprocketchain 21 to an intermediate shaft 22, driven at half the speed of the crank-shaft by means of suitable sprocket-wheels 23 and 24 and a sprocket-chain 25, said shaft 22 being mounted in suitable bearings 26.

The operation of my improved hydrocarbon engine and its advantages will be readily apparent to those skilled in the art and need not be described in detail.

I claim:

1. The improved hydro-carbon engine, comprising twin parallel cylinders, twin pistons in said cylinders, a partition-wall separating said cylinders and limited in length, a crank-shaft, a bifurcated crosshead having vertical forks which are eX- www w their connection with said forks, a cross? 5v head pin carried by the lower end of: saldfA cross-head, and a single connecting-rod exsV tending from. said crossfhead pintofV said- Crank-Shat.

2. A hydrocarbon engine having a num- 10 ber of pairs of parallel twin cylinders ar.-

ranged on a single crankshaft-,pistons in each pair of said cylinders, a partition`- wally separating'the compression endrof each pair of cylinders,` bii'furcated` cross-,heads efdddiing the 'add vpdititidd-dans', d dross- ,hea'd pinvat the lower end of each crosshead', a single compression-space connecting the cylinders of each pair, a crankshaft having al number of cranks formed thereon, anda connecting-rod attached to each crosshead'` pinand to said crank-shaft.;

In testimony whereof, I havesigned myy name toythis specification, in presence' of two subscribing witnesses.

Witnesses-:.4v

Y E. L.v VVALLAGE,V

. lioHNv HIGDoN.

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